Iscsi Initiator (Optional, Vtl Only); Manual Iscsi Initiator Installation; The Iscsi Initiator And Authentication - HP StoreOnce 4900 Backup Installation And Configuration Manual

NOTE: For a Fibre Channel Backup system, a new "unknown" device will be discovered in
Device Manager. This device is required only to ensure that a Fibre Channel target exists as LUN
0 in the SAN. No functionality is provided by this device and no driver is required.

iSCSI Initiator (optional, VTL only)

This section is not relevant if you are configuring only FC library devices, Catalyst stores or NAS
shares on your HP StoreOnce Backup system.
NOTE: FC products may be configured with a mixture of FC and iSCSI Virtual Tape Devices. If
you are configuring your HP StoreOnce Backup system to have iSCSI Virtual Tape Devices (for
hosts attached via the LAN ports), this section is relevant. However, if you are configuring it to
have only FC devices (attached via the FC ports), it is not necessary; you may use the StoreOnce
GUI or CLI to create FC library devices, see the HP StoreOnce Backup system user guide.
iSCSI is a protocol for sending SCSI commands via Ethernet. It defines how SCSI packets are
translated to Ethernet packets and connects to the required devices. An iSCSI initiator may be
hardware or software and should be running on each host. If the host does not have an iSCSI
initiator, it will not be able to connect to the library configured on the HP StoreOnce Backup system
and will not be able to perform backups.
For Linux and UNIX operating systems an iSCSI initiator is embedded in the operating system.
Please refer to the HP StoreOnce Backup system Linux and UNIX Configuration Guide on the HP
StoreOnce Backup system CD-ROM for further information. Make sure that you have downloaded
the latest operating system patches before you configure your system.
For Windows systems the Microsoft iSCSI initiator is required to connect to any Virtual Tape Libraries
created on the HP StoreOnce Backup system. The iSCSI initiator ships with later versions of Microsoft
Windows, but not with Windows 2003 or earlier. HP is not permitted to include the iSCSI initiator
on the CD. So, if required, it must be retrieved from the Microsoft website.
NOTE: With some versions of Windows the iSCSI initiator service is not started by default. This
component must be configured manually by the user to run on startup. Do this through the Control
Panel.

Manual iSCSI initiator installation

1. On a machine that supports an external internet connection, go to the Microsoft website and
search on iSCSI initiator.
2. Select the result that takes you to the Download page and choose the download that is
appropriate for your host.
3. Download the iSCSI initiator and install it on the host, accepting all the default settings.

The iSCSI Initiator and Authentication

Authentication is not required for the HP StoreOnce Backup system, but it is supported for those
companies that have an IT policy that requires them to use authentication. If this is the case, you
will need to configure the necessary fields on the iSCSI Initiator and also ensure that the
corresponding information is supplied in the StoreOnce GUI. This enables the Initiator to log into
the target device on the HP StoreOnce Backup system and the target device to log into the Initiator.
The authentication method supported on StoreOnce products is CHAP. It relies on a "secret" known
only to the target and initiator. The size of the CHAP secret is between 12 and 16 characters, and
must be entered in exactly the same format in both the Web Management Interface and the iSCSI
initiator. An 'Authentication Failure' message will occur if the same 'secret' and 'user name'
information are not entered into the iSCSI Initiator screen and the Web Management Interface.
Further details on authentication and CHAP can be found within standard iSCSI protocol
documentation.
iSCSI Initiator (optional, VTL only) 93